Employee Benefit Plans - Additional Information (Details) In Millions, unless otherwise specified	9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Deferred Compensation Plan USD ($)	Sep. 30, 2014 Pension Plan, Defined Benefit USD ($)	Sep. 30, 2013 Pension Plan, Defined Benefit USD ($)	Sep. 30, 2014 Pension Plan, Defined Benefit USD ($)	Sep. 30, 2013 Pension Plan, Defined Benefit USD ($)	Jun. 30, 2012 Pension Plan, Defined Benefit USD ($)	Jun. 30, 2012 Pension Plan, Defined Benefit GBP (£)
Employee Benefit Plans Additional Information [Abstract]
Defined Benefit Plans, General Information				The Company has a contributory defined benefit plan that covers certain employees in the United Kingdom (“U.K.”). The net pension and supplemental retirement benefit obligations and the related periodic costs are based on, among other things, assumptions regarding the discount rate, estimated return on plan assets and mortality rates. These obligations and related periodic costs are measured using actuarial techniques and assumptions.
Defined Benefit Plan, Pension, Method to Determine Vested Benefit Obligation				The projected unit credit method is the actuarial cost method used to compute the pension liabilities and related expenses.
Net period benefit costs		$ 0	$ 0	$ 1	$ 0
Deferred Compensation Plan Assets	5
Deferred Compensation Arrangements, Overall, Description	The Company maintains a Non-Qualified Deferred Compensation Plan (the “Deferred Compensation Plan”) for executive officers, key employees and members of the Board of Directors (the “Board”). The Deferred Compensation Plan allows eligible participants to defer the receipt of eligible compensation, including equity awards, until designated future dates. The Company offsets its obligations under the Deferred Compensation Plan by investing in the actual underlying investments. These investments are classified as trading securities and are carried at fair value. At September 30, 2014, these investments totaled approximately $5 million. All gains and losses in these investments are materially offset by corresponding gains and losses in the Deferred Compensation Plan liabilities.
Change in Plan Assets [Roll Forward]
Weighted average discount rate benefit obligations		4.10%		4.10%
Estimated Future Pension Benefit Payments [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year, Description				During the second quarter of 2012, the Company adopted a payment plan with the trustees of the defined benefit plan, in which the Company will pay approximately ₤2 million British Pound Sterling (“GBP”) (approximately $3 million based on a USD:GBP exchange rate of 1.6:1) every year from 2012 through 2019. As part of the required pension review, which occurs every three years under the U.K. pension regulations, the Company is currently in discussions with the trustees regarding future contributions for the pension scheme.
Defined Benefit Plan, Expected Future Benefit Payments							2
Defined Benefit Plan, Expected Future Benefit Payments in Year One						3	2
Defined Benefit Plan, Expected Future Benefit Payments in Year Two						3	2
Defined Benefit Plan, Expected Future Benefit Payments in Year Three						3	2
Defined Benefit Plan, Expected Future Benefit Payments in Year Four						3	2
Defined Benefit Plan, Expected Future Benefit Payments in Year Five						3	2
Defined Benefit Plan, Expected Future Benefit Payments in Three Fiscal Years Thereafter						$ 3	£ 2
USD:GBP exchange rate						0.625